Sienna Miller is reportedly angry at boyfriend Rhys Ifans after he tried to broker a ceasefire between the actress and his Primrose Hill set friends.

According to the Sun, Sienna tried to make amends with the group’s leader Kate Moss before Davinia Taylor’s 90s-themed 30th birthday party at the weekend but Kate rebuffed her and is said to have warned Sienna that she’ll make an “enemy for life” if she hurts Rhys.

A source explained that Rhys’ former friends have distanced themselves from him while he’s dating the Factory Girl star: “Rhys has felt a huge hole in his life where his friends used to be. He’s accepted it would be impossible for him to be mates with Sienna’s ex Jude Law now.”

“But he thought if he could swing Kate around he would be able to get friends like Sadie Frost and Davinia’s husband Dave Gardner back onside.”

“Rhys persuaded Sienna to call Kate the night before Davinia’s party to see if she needed any help. She refused at first, saying it would be a really unnatural thing to do.”

“But Rhys finally convinced Sienna, telling her to act it out like a part. They even rehearsed the conversation with Rhys as the director and Sienna as the actress.”

“When Sienna finally called and asked Kate if she needed any help preparing for the party. Kate just laughed it off, patronisingly called her ‘a sweetheart’ and told her to have a good night.”

“Sienna feels humiliated and is furious with Rhys, Kate and the whole situation. She even told her fella to go on holiday by himself and Rhys got her mum Jo involved.”

“Sienna’s mum told her to go and have a bit of fun with Rhys away from everyone.”

The couple are now holidaying together in Mexico City.